Hello Harshad,
Hope you are doing well.
For the first error, please check whether you are using flag "Use Anonymous Source of Supply if No Source Exists" in the Service Profile for EOQ/SS service. Also, make sure that the SA and TLane are active and within a time validity, and that the location mentioned in the message is the Location To of the SA and of the TLane.
For the second error, please check whether you do have values in key figure "Demand: Std Dev. Final Forecast" in the /SAPAPO/SPPFCST screen. If not, then please run service SPP_FCS_SERVICE_MSE in order to calculated the Standard Deviation values.
I hope I could help you. 
Best Regards,
Rodrigo Pessin.